I was playing as Arcean and noted the following things when in a trade window with the Drengin.

1) I had a tech called "Advamced Navigation Centers"
2) No description for Xeno Slavery from the Drengin.

Also when creating a custom game, all options seem to follow the same color scheme. Most abundant settings have a green outline while most rare get a red outline. Asteroids are exactly opposite, abundant asteroids show up as red and rare asteroids show up as green.

From an intuitive UI perspective, I have to assume it's not supposed to be that way.

Good game so far though whatever influence modifiers the Drengin have are outrageous. I floated in a sea of red and I had the majority of planets/population/influence resources.